System.out.println();
System.out.println("Performance: " + first.getPerformance());
first.increaseSalary(10);
System.out.print(Currency);
System.out.printf("%,.2f", first.getSalary()); //display number with commas to separate three digits of decimal figure, . as the decimal point and up to 2 precision numbers after the decimal point.
System.out.print(" yearly.");

if (first.equals(first)) {System.out.println(" Reflexive: first employee is equal to itself");}
if (first.equals(second)) {System.out.println(" Symmetric: first employee is equal to the second object");}
if (second.equals(first)) {System.out.println(" Transitive: second employee is equal to the first object");}

if (first == second) {System.out.println("it is not valid to compare objects using ==");}